Do a heat loss survey in your home.
Insulate where you can now.
This has made a massive change to my consumption.
You can buy cheap insulation boards on eBay facebook market place etc.
Do loft insulation first. Can be a DIY job.
I insulated under my floorboards myself last week. We have a crawl space
Look at draughts through windows. Get seals. Amazon eBay etc.
Buy 2nd hand lined thermal curtains.
Or add fleece etc to existing curtains.
Get a front door curtain to eliminate draughts.
Buy thermals clothing for family.
Get blankets also to have around living room.
Don't bother ironing unless absolutely necessary.
Get an indoor broom instead of hoover.
Use hoover less frequently.
Don't use tumble dryer.
Wash on economy wash 30min cycle.
Get a heated blanket. Cost pennies and don't need heating.
Have shorter showers.
Batch cook and freeze.
Only boil water in kettle you need.
Main major consumer of energy are:
Hot water
Heating
Boiling kettles
Oven
Tumble dryer
Hoover
Lawn mower
The rest like lights, modern TV, computers, charging phones and other appliance like modern fridge freezer are not major consumers.
So focus on the main ones.
Insulating your home will mean less heating required and a comfortable home.